When the Civil War ended in 1865 , the Fourteenth and Fifteenth Amendments to the Constitution adopted in 1868 and 1870 granted citizenship and right to vote to blacks but not to women. Discouraged but resolved, feminists influenced more and more women to demand this right. In 1869 the Wyoming Territory had yielded to demands by feminists, but eastern states resisted more stubbornly than before. A women' s voting bill had been presented to every Congress since 1878 but it continually failed to pass until 1920, when the Nineteenth Amendment granted women the right to vote.
With what topic is the passage primarily concerned？

A. The Wyoming Territory.
B. The Fourteenth and Fifteenth Amendments.
C. Abolitionists.
D. Women's Right to Vote.